Syenite yog pob zeb intrusive pob zeb Intrusive pob zeb yog tsim thaum magma nkag mus rau cov pob zeb uas twb muaj lawm, crystallizes, thiab solidifies underground tsim intrusion, xws li batholiths, dikes, sills, laccoliths, thiab volcanic caj dab. … Ib qho kev cuam tshuam yog ib lub cev ntawm cov pob zeb uas tsis muaj zog, tsim los ntawm magma uas ua kom txias thiab khov rau hauv lub pob zeb ntawm lub ntiaj teb. https://en.wikipedia.org › wiki › Intrusive_rock
Intrusive pob zeb - Wikipedia
belongs rau cov alkali series ntawm nruab nrab plutonic pob zeb. Alkali feldspar (xws li orthoclase) yog cov ntxhia tseem ceeb ntawm syenite, tag nrho cov ntsiab lus feldspar yog > 65%, thiab quartz feem ntau tsis muaj.
Puas yog syenite volcanic lossis plutonic?
The volcanic sib npaug ntawm syenite yog trachyte. Syenite feem ntau tsim nyob rau hauv tuab continental crustal cheeb tsam, los yog nyob rau hauv Cordilleran subduction zones. Nepheline syenite yog lwm lub pob zeb plutonic uas muaj ntau ntawm nepheline thiab alkali feldspar. Nws yog qhov sib npaug ntawm qhov extrusive nplua-grained pob zeb phonolite.
Puas yog syenite yog plutonic pob zeb?
Syenite yog coarsely crystalline plutonic nruab nrab pob zebmuaj cov tseem ceeb ntawm alkali feldspar nrog tsawg dua 5% quartz thiab / lossis feldspathoid.
pob zeb dab tsi yog syenite?
Syenite, ib qho ntawm chav kawm ntawm cov pob zeb tsis muaj zogqhov tseem ceeb ntawm cov alkali feldspar thiab ib qhoferromagnesian ntxhia. Ib pawg tshwj xeeb ntawm alkali syenites yog tus cwj pwm los ntawm qhov muaj cov pob zeb feldspathoid xws li nepheline, leucite, cancrinite, lossis sodalite (saib nepheline syenite).
Vim li cas syenite raug cais raws li cov pob zeb uas tsis muaj zog?
Syenite yog pob zeb tsis muaj zog uas pib ua los ntawm alkali feldspar thiab ferromagnesian ntxhia. Ib pawg tshwj xeeb ntawm alkali syenites yog tus cwj pwm los ntawm qhov muaj cov pob zeb feldspathoid suav nrog nepheline, leucite, cancrinite, lossis sodalite (saib nepheline syenite).
